1972 Colt Ar-15 Sp1

Discussion in 'AR-15 Discussion' started by rocshaman, Nov 25, 2012.

  1. rocshaman

    rocshaman New Member

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    Just wondering what you can tell me about this Colt, its worth, how good a gun is it etc. It seems to be in good shape, haven't fired it yet but I I will be shooting it before too long.
     
  2. JonM

    JonM Moderator

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    they are great rifles. dont shoot steel cased stuff out of them however the chambers arent chrome lined and they are chambered for 223 only. in pristine ondition they run up to 2k$ to the right collector more if they have the original colt scope stamped made in japan
     

  3. rocshaman

    rocshaman New Member

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    Thanks for the info Jon, especially about what ammo to use. The gun was my Dad's and he didn't shoot it much at all, it's very good condition.
     
  4. homelessguy01

    homelessguy01 New Member

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    Can you post some pictures?
     
  5. Quentin

    Quentin New Member

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    Yes, definitely!
     
  6. rocshaman

    rocshaman New Member

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    Sure, I'll put some up in a few...
     
  7. rocshaman

    rocshaman New Member

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    Here you go fellas.

    100_1953.jpg

    100_1954.jpg

    100_1955.jpg

    100_1956.jpg
     
  8. homelessguy01

    homelessguy01 New Member

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    A real beauty! Great shape for an old gun!
     
  9. primer1

    primer1 Well-Known Member Supporter

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    Nice! Do you plan on keeping it? Does it have the twist stamped in the barrel? I believe some of those early ones were a 1:12, but I'm not sure. Jon or someone feel free to verbally stomp me if I'm wrong.
     
  10. rocshaman

    rocshaman New Member

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    Yes, I plan to keep it and it is a 1:12 twist on that barrel. I've read you need to use lighter grain bullets with that twist. Is a 55 grain to heavy for that twist? Or should it be lighter than that?
     
  11. primer1

    primer1 Well-Known Member Supporter

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    Try it for grouping, not sure. I would guess that would be at the upper limit for weight.
     
  12. locutus

    locutus Well-Known Member Supporter

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    That weapon was specifically designed for the 55 grain M193 ball ammo.:D
     
  13. rocshaman

    rocshaman New Member

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    The barrel on this gun is marked C MP CHROME BORE and from everything I've read that means the chamber and barrel are both chromed. I've also read they'll handle .223 and 5.56 NATO, but the lower is stamped Cal .223 so not sure if I can trust that info.
     
  14. locutus

    locutus Well-Known Member Supporter

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    It is chromed in both chamber and bore. And you can use 5.56 in it.

    BTW, is the receiver marked "Car-15" or "SP1?"

    IIRC, by 1972 all of them were chrome lined, had 5.56 chambers and round hand guards.

    The designation 5.56X 45mm was not in common usage outside of military circles back then, and 5.56 rifles were generally marked .223
     
    Last edited: Nov 30, 2012
  15. rocshaman

    rocshaman New Member

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    I don't remember seeing that, I'll check when I get a chance. What does it mean if it is?
     
  16. locutus

    locutus Well-Known Member Supporter

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    Car-15 was the original designation for the carbine version of the AR15/M16 rifles.